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mounter.go
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/
mounter.go
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package bindmount
import (
"fmt"
"os"
"path/filepath"
"syscall"
"golang.org/x/sys/unix"
)
type Mounter struct{}
func (m *Mounter) IdempotentlyMount(source, target string) error {
err := os.MkdirAll(filepath.Dir(target), 0600)
if err != nil {
return fmt.Errorf("os.MkdirAll failed: %s", err)
}
fd, err := os.Create(target)
if err != nil {
return fmt.Errorf("os.Create failed: %s", err)
}
defer fd.Close()
err = unix.Mount(source, target, "none", unix.MS_BIND, "")
if err != nil {
return fmt.Errorf("mount failed: %s", err)
}
return nil
}
func (m *Mounter) RemoveMount(target string) error {
err := unix.Unmount(target, unix.MNT_DETACH)
if err != nil && err != syscall.ENOENT {
return fmt.Errorf("unmount failed: %s", err)
}
err = os.RemoveAll(target)
if err != nil {
return fmt.Errorf("removeall failed: %s", err) // not tested
}
return nil
}